235 citations · 2.4k across the 56 of their papers we have counts for
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Superorbital variability of X-ray and radio emission of Cyg X-1. I. Emission anisotropy of precessing sources
A. Ibragimov, A. A. Zdziarski, J. Poutanen
We study theoretical interpretations of the 150-d (superorbital) modulation observed in X-ray and radio emission of Cyg X-1 in the framework of models connecting this phenomenon to…
INTEGRAL Broadband X-ray spectrum of the intermediate polar V709 Cas
M. Falanga, J. M. Bonnet-Bidaud, V. Suleimanov
We present the hard X-ray time-averaged spectrum of the intermediate polar V709 Cas observed with INTEGRAL. We performed the observation using data from the IBIS/ISGRI instrument i…
The Distribution of Bar and Spiral Strengths in Disk Galaxies
R. Buta, S. O. Vasylyev, H. Salo +1
The distribution of bar strengths in disk galaxies is a fundamental property of the galaxy population that has only begun to be explored. We have applied the bar/spiral separation…
Broad-band spectra of Cyg X-1 and correlations between spectral characteristics
Askar Ibragimov, Juri Poutanen, Marat Gilfanov +2
We present the results of spectral analysis of 42 simultaneous broad-band Ginga--OSSE and RXTE--OSSE observations of Cyg X-1 carried out in 1991 and 1996--1999. The hardest spectra…
X-ray luminosity function of low-mass X-ray binaries in galaxies
K. A. Postnov, A. G. Kuranov
X-ray luminosity function derived from observations of X-ray sources in galactic bulges can be explained by prinicipal evolutionary relations for mass accretion rate onto the compa…
The supernova 2003lw associated with X-ray flash 031203
B. Thomsen, J. Hjorth, D. Watson +13
The X-Ray Flash (XRF), 031203 with a host galaxy at z=0.1055, is, apart from GRB980425, the closest Gamma-Ray Burst (GRB) or XRF known to date. We monitored its host galaxy from 1-…
Local models of stellar convection: Reynolds stresses and turbulent heat transport
P. J. Käpylä, M. J. Korpi, I. Tuominen
We study stellar convection using a local three-dimensional MHD model, with which we investigate the influence of rotation and large-scale magnetic fields on the turbulent momentum…
The Distribution of Maximum Relative Torques in Disk Galaxies
R. Buta, E. Laurikainen, H. Salo
The maximum ratio of the tangential force to the mean background radial force is a useful quantitative measure of the strength of nonaxisymmetric perturbations in disk galaxies. He…
The radial velocities and physical parameters of HD 553
R. Duemmler, I. Kh. Iliev, L. Iliev
HD 553 was discovered as an eclipsing binary by Hipparcos. Here, we present the first radial velocity curve for this system. It is found that HD 553 is a double-lined spectroscopic…
Constraints on the optical afterglow emission of the short/hard burst GRB 010119
J. Gorosabel, M. I. Andersen, J. Hjorth +7
We report optical observations of the short/hard burst GRB 010119 error box, one of the smallest error boxes reported to date for short/hard GRBs. Limits of R > 22.3 and I > 21.2 a…
HST/STIS Imaging of the Host Galaxy of GRB980425/SN1998bw
J. U. Fynbo, S. Holland, M. I. Andersen +6
We present HST/STIS observations of ESO 184-G82, the host galaxy of the gamma-ray burst GRB 980425 associated with the peculiar Type Ic supernova SN1998bw. ESO 184-G82 is found to…
Chemical composition of evolved stars in the open cluster M 67
G. Tautvaisiene, B. Edvardsson, I. Tuominen +1
High-resolution spectra of six core helium-burning `clump' stars and three giants in the open cluster M 67 have been obtained with the SOFIN spectrograph on the Nordic Optical Tele…